Abstract:
GPS Trails data collected from 1990 to 2004 in the Lake Havasu Field Office and adjacent areas with additions from 2005 through 2007. This area includes parts of the following counties: Mohave, La Paz, Yavapai, and Maricopa in Arizona and San Bernardino in California.

Metadata elements shown with blue text are defined in the
Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM).
Elements shown with green
text are defined in the ESRI Profile of the CSDGM.
Elements shown with a green asterisk (*)
will be automatically updated by ArcCatalog.
ArcCatalog adds hints indicating which FGDC elements are mandatory;
these are shown with gray text.

GPS Trails data collected from 1990 to 2004 in the Lake Havasu Field Office and adjacent areas with additions from 2005 through 2007. This area includes parts of the following counties: Mohave, La Paz, Yavapai, and Maricopa in Arizona and San Bernardino in California.

Purpose:

This data is intended to be the complete inventory of existing trails in the Lake Havasu Field Office Approved Resource Management Plan of 2007. This will be the base data used in route designation.

Supplemental information:

Data sources vary as follows:
1. Parker Strip, California side collected by Les Allert in 1990.
2. Harcuvar Area collected by Les Allert in 1995.
3. From I-40 to AZ Hwy 72 in AZ east to Alamo Dam Road collected by Becca Hooker 1995-97.
4. East of Alamo Road and north of the Harcuvar Area collected by Les Allert in 2000.
5. Bullhead area collected by Recreation Solutions in 2004.
6. Lake Havasu area State Lands and reinventory of the Standard Wash area collected by Recreation Solutions in 2004.
7. Bouse South for the LaPosa Plan collected by Yuma Field Office in 1997, but may be only digitized from topo.
8. Reinventory of Bouse South, inventory of Bouse North, east to Field Office boundary in the Harquahala area collected by Recreation Solutions in 2004.
9. California side of Lake Havasu, Chemehuevi Wash and Needles area collected by CA BLM Cadastral Survey in 2004.
10. Aubrey Hills area collected by Becca Hooker and Les Allert in 1997, Horse trails in same area collected by Equestrian volunteers in 2004.

The data was collected using approved data dictionaries by trained contractors and other trained users. Previous data dictionaries did not collect all of the data included in the current data dictionary. Therefore, attribute data is incomplete and should be updated in the future.

Quantitative attribute accuracy assessment:

Attribute accuracy value:
85%

Attribute accuracy explanation:

Trained use of the data dictionary should minimize errors. Data not included in previous data dictionaries needs update.

Logical consistency report:

All data was collected using resource grade GPS corrected from base stations.
Mode of transportation included ATV(60%), Motorcycle(28%), Foot(1%), Four wheel drive SUV(10%), and horse(1%).

Completeness report:

At the publication date, the data should be near 100% complete. The inventory has been updated through the Draft Lake Havasu RMP comment period as missing trails were identified.
The inventory concentrated on public (BLM) lands. State, private and other lands may not have complete inventories in this dataset.

Positional accuracy:

Horizontal positional accuracy:

Horizontal positional accuracy report:

All data was collected using resource grade GPS corrected from base stations.

GPS data was intergrated into the trails dataset as inventories were completed in order to have one complete layer for the Lake Havasu Field Office. Attribute data was updated as data dictionaries changed. The data was checked for duplicates and Route Numbers were assigned.

Process software and version:
ArcInfo Workstation 7.1, ArcGIS 8.3

Process date:
1990 - 2004

Source produced citation abbreviation:

trails_l

Process contact:

Contact information:

Contact person primary:

Contact person:
Les Allert

Contact organization:
Lake Havasu Field Office, Bureau of Land Management

not documented for most, automatically generated for current data dictionary

Attribute measurement frequency:

Irregular

Attribute:

*Attribute label:
DESIGNATIO

*Attribute alias:
DESIGNATIO

Attribute definition:

Route designation

Attribute definition source:

standard AZ BLM State data dictionary

*Attribute type:
String

*Attribute width:
52

*Attribute output width:
1

Attribute domain values:

Enumerated domain:

Enumerated domain value:
O

Enumerated domain value definition:

Open Route

Enumerated domain value definition source:

ArcInfo Trails Theme

Enumerated domain:

Enumerated domain value:
C

Enumerated domain value definition:

Closed

Enumerated domain value definition source:

ArcInfo Trails Theme

Enumerated domain:

Enumerated domain value:
L

Enumerated domain value definition:

Limited Use Route

Enumerated domain value definition source:

ArcInfo Trails Theme

Enumerated domain:

Enumerated domain value:
U

Enumerated domain value definition:

Undesignated Route

Enumerated domain value definition source:

ArcInfo Trails Theme

Enumerated domain:

Enumerated domain value:
E

Enumerated domain value definition:

Existing Route Within Open Area

Enumerated domain value definition source:

ArcInfo Trails Theme

Beginning date of attribute values:
1990

Attribute value accuracy information:

Attribute value accuracy:
98%

Attribute value accuracy explanation:

current route designations based on planning efforts

Attribute measurement frequency:

As needed

Attribute:

*Attribute label:
RESTRICTIO

*Attribute alias:
RESTRICTIO

Attribute definition:

Route restrictions

Attribute definition source:

standard AZ BLM State data dictionary

*Attribute type:
String

*Attribute width:
20

*Attribute output width:
4

Beginning date of attribute values:
1990

Attribute value accuracy information:

Attribute value accuracy:
98%

Attribute value accuracy explanation:

based on route designations through planning efforts

Attribute measurement frequency:

As needed

Attribute:

*Attribute label:
MILES

*Attribute alias:
Shape_Length

*Attribute definition:

Length of feature in internal units.

*Attribute definition source:

ESRI

*Attribute type:
Date

*Attribute width:
8

*Attribute output width:
19

Attribute domain values:

*Unrepresentable domain:

Positive real numbers that are automatically generated.

Beginning date of attribute values:
1990

Attribute value accuracy information:

Attribute value accuracy:
100%

Attribute value accuracy explanation:

calculated using XTools

Attribute measurement frequency:

As needed

Attribute:

*Attribute label:
MAINTENANC

Attribute definition:

Describes maintenance needed

Attribute definition source:

Arizona Route Inventory Data Dictionary

*Attribute type:
String

*Attribute width:
1

*Attribute output width:
20

Beginning date of attribute values:
1990

Attribute value accuracy information:

Attribute value accuracy:
25%

Attribute value accuracy explanation:

not used correctly for current data dictionary

Attribute measurement frequency:

As needed

Attribute:

*Attribute label:
OBJECTID

*Attribute alias:
OBJECTID

Attribute definition:

id generated from previous data

Attribute definition source:

ESRI

*Attribute type:
String

*Attribute width:
4

*Attribute output width:
10

Attribute domain values:

Unrepresentable domain:

Positive real numbers that are automatically generated.

Attribute:

*Attribute label:
Shape_Leng

*Attribute alias:
Shape_Leng

Attribute definition:

Length of feature in internal units.

Attribute definition source:

ESRI

*Attribute type:
String

*Attribute width:
4

*Attribute output width:
4

Attribute value accuracy information:

Attribute value accuracy:
unknown

Attribute value accuracy explanation:

may not have been updated

Attribute measurement frequency:

None planned

Attribute:

*Attribute label:
PRIORITY

Attribute definition:

unknown

Attribute definition source:

unknown

*Attribute type:
String

*Attribute width:
50

*Attribute output width:
4

Beginning date of attribute values:
1990

Attribute value accuracy information:

Attribute value accuracy:
unknown

Attribute value accuracy explanation:

unknown

Attribute measurement frequency:

Unknown

Attribute:

*Attribute label:
PLANS

Attribute definition:

plan that designated routes

Attribute definition source:

unknown

*Attribute type:
Number

*Attribute width:
19

*Attribute output width:
50

*Attribute number of decimals:
11

Attribute domain values:

Beginning date of attribute values:
1990

Attribute value accuracy information:

Attribute value accuracy:
98%

Attribute value accuracy explanation:

based on available data

Attribute measurement frequency:

As needed

Attribute:

*Attribute label:
ROAD_NO

*Attribute alias:
ROAD_NO

Attribute definition:

Route inventory number

Attribute definition source:

Arizona Route Inventory Data Dictionary

*Attribute type:
Number

*Attribute width:
19

*Attribute output width:
10

*Attribute number of decimals:
11

Attribute domain values:

Unrepresentable domain:

Positive real numbers that are manually generated.

Beginning date of attribute values:
1990

Attribute value accuracy information:

Attribute value accuracy:
98%

Attribute value accuracy explanation:

corrected as needed

Attribute measurement frequency:

As needed

Attribute:

*Attribute label:
Technical

*Attribute alias:
Technical

Attribute definition:

trails used by specifically equipped 4WD vehicles

Attribute definition source:

LHFO BLM

*Attribute type:
String

*Attribute width:
20

Attribute domain values:

Enumerated domain:

Enumerated domain value:
Yes

Enumerated domain value definition:

trail requires specialized equipment

Enumerated domain value definition source:

LHFO BLM

Beginning date of attribute values:
2005

Attribute value accuracy information:

Attribute value accuracy:
100%

Attribute value accuracy explanation:

identified by users

Attribute measurement frequency:

As needed

Overview description:

Dataset overview:

Data sources vary as follows:
Parker Strip, California side collected by Les Allert in 1990.
Harcuvar Area collected by Les Allert in 1995.
From I-40 to AZ Hwy 72 in AZ east to Alamo Dam Road collected by Becca Hooker 1995-97.
East of Alamo Road and north of the Harcuvar Area collected by Les Allert in 2000.
Bullhead area collected by Recreation Solutions in 2004.
Lake Havasu area State Lands and reinventory of the Standard Wash area collected by Recreation Solutions in 2004.
Bouse South for the LaPosa Plan collected by Yuma Field Office in 1997, but may be only digitized from topo.
Reinventory of Bouse South, inventory of Bouse North, east to FO boundary in the Harquahala area collected by Recreation Solutions in 2004.
California side of Lake Havasu, Chemehuevi Wash and Needles area collected by CA BLM Cadastral Survey in 2004.
Aubrey Hills area collected by Becca Hooker and Les Allert in 1997, Horse trails in same are collected by Equestrian volunteers in 2004.

Entity and attribute overview:

The first 70 % of the data was collected using a standard AZ BLM State data dictionary.
Recreation Solutions, working with Phoenix Field Office And AZ State Lands Dept. developed a different data dictionary and it was used for most of the remaining data collection.
The CA BLM Cadastrial Survey data used a third data dictionary.
The final set of attributed in this dataset is based upon the Recreation Solutions data dictionary that has now been adopted by AZ BLM GIS. The dataset includes several additional fields from the original data dictionary, mostly refering to designations and restrictions.

BLM-LHFO provides this data "as is" without liability. No warranty is made by the Bureau of Land Management as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data.